UK Company Tax Returns

UK Company Tax Returns

Every UK limited company is legally required to file a Company Tax Return — also known as a CT600 — with HMRC for every accounting period, regardless of whether the company made a profit or traded at all during that period. Filing must be accompanied by statutory accounts prepared in accordance with UK accounting standards, and both must be submitted within 12 months of the end of the accounting period, with any corporation tax owed paid within 9 months and one day. Failure to file on time results in automatic penalties that escalate the longer the return remains outstanding. Eboostory provides professional UK company tax return preparation and filing services that ensure your company meets every HMRC obligation accurately, on time, and in full compliance with UK tax law.

Corporation Tax Computation & CT600 Preparation

We prepare your company's corporation tax computation — calculating your taxable profits by adjusting your accounting profit for all disallowable expenses, capital allowances, and other tax adjustments required by UK tax law — and complete your CT600 Company Tax Return with full accuracy. The current UK corporation tax rate structure, with its main rate and small profits rate, requires careful computation to ensure the correct rate is applied to your profits and all available reliefs are correctly claimed.

Statutory Accounts Preparation

UK company tax returns must be filed alongside statutory accounts prepared in accordance with UK Generally Accepted Accounting Practice (UK GAAP) or International Financial Reporting Standards (IFRS). We prepare your company's statutory accounts — including the balance sheet, profit and loss account, notes to the accounts, and directors' report where required — in the correct format for both HMRC submission and Companies House filing. Accurate statutory accounts are the foundation of your corporation tax computation and a legal requirement for every UK limited company.

Capital Allowances & Relief Claims

Capital allowances allow UK companies to deduct the cost of qualifying capital expenditure — plant and machinery, equipment, vehicles, and certain building improvements — from their taxable profits. We identify all qualifying capital expenditure in your accounts and claim the maximum available capital allowances, including Annual Investment Allowance (AIA) and Writing Down Allowances (WDA), to reduce your corporation tax liability as much as the law permits. Many companies significantly overpay corporation tax simply by failing to claim all available capital allowances correctly.

R&D Tax Credits

The UK government offers generous Research and Development tax credits for companies that undertake qualifying R&D activities — including software development, product innovation, process improvement, and many other activities that companies often do not realize qualify. We assess your business activities against HMRC's R&D criteria and prepare enhanced R&D relief claims where applicable, potentially generating significant additional tax savings or cash repayments from HMRC that directly improve your company's cash position.

HMRC Filing & Companies House Submission

We handle the complete submission process — filing your CT600 and tax computations with HMRC through the correct online channels, submitting your statutory accounts to Companies House within the required timeframe, and providing you with confirmation of all submissions and any tax payment obligations due. We manage all deadlines proactively so that nothing is ever filed late, penalties are never incurred, and your company's compliance record with both HMRC and Companies House remains clean and up to date at all times.